// Copyright 2022 BaihaiAI, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

pub fn get_hostname() -> String {
    const BUF_LEN: usize = 128;
    let mut hostname_buf = [0u8; BUF_LEN];
    unsafe {
        if libc::gethostname(hostname_buf.as_mut_ptr().cast(), BUF_LEN) == -1 {
            panic!("{}", std::io::Error::last_os_error());
        }
        let len = libc::strlen(hostname_buf.as_ptr().cast());
        String::from_utf8_unchecked(hostname_buf[..len].to_vec())
    }
}
